A.1.1.2 To Configure GDM on Linux Systems

To configure GDM on Linux systems, perform the following steps:

1. Log in as the root user.

2. Open the file /etc/X11/gdm/gdm.conf.

3. Search the file for the following line:

   #AddGtkModules=false

   and replace the line with the following:

   AddGtkModules=true

   This step enables the GtkModules.

4. Search the file for the following line:

   #GtkModulesList=gail:atk-bridge:dwellmouselistener:keymouselistener

   and delete the # from the start of the line so that the line reads:

   GtkModulesList=gail:atk-bridge:dwellmouselistener:keymouselistener

   ---

   Note –

   The above lines must be displayed as single lines in the gdm.conf file without line breaks. The formatting of this guide may display the lines over two lines.

   ---

   This step loads all of the GtkModules to enable assistive technologies such as On-Screen Keyboard and Screen Reader and Magnifier. You can edit the line above further to load only the GtkModules that you require to support the user base. For example:

   • If you need to use the Screen Reader and Magnifier, include gail and atk-bridge.

   • If you need to use a pointing device without buttons or switches, include gail, atk-bridge, and dwellmouselistener.

   • If you use pointing devices with switches, alternative physical keyboards, or switch and button devices, include keymouselistener.

   • On-Screen Keyboard can operate without gail and atk-bridge but with a reduced feature set.

   For optimum accessibility, include gail and atk-bridge.

5. Save the /etc/X11/gdm/gdm.conf file.

   ---

   Note –

   If you make any changes to the /etc/X11/gdm/gdm.conf file after you enable GDM, you can execute the following command to restart GDM and activate the changes:

   gdm-restart

   ---

6. Edit the file /etc/group and append the following to the audio line:

   ,gdm

   This step ensures that speech works with GDM.

7. Restart your system.